Question

a wire is bent in the form of a square of side 16.5 cm . its is strainghtened and then bent into a circle . what is the radious of a circle so formed ( take r = 22/7

Answer 1

First we find the perimeter of the square

4*side=perimeter
4*16.5=perimeter
66cm = perimeter

According to the question,
Perimeter of square=Circumference of circle
so,

2*pi*r=66cm
2*22/7*r=66cm
r=66*7/22*2
r=21/2
r=10.5

So,
The radius of the circle is 10.5